remove unused SvRefBase constructor
remove unused SvRefBase constructor

Change-Id: I81991231a2cc0b0c9d8289db8435ef8286f1c2bb

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core